Lock for threaded devices



Maid 17, 1925.

w. F. RoEsKE LOCK FOR THREADED DEVICES Filed Feb r. 10, 1921 2 Sheets-Sheet l 4March 17, 1925.

w. F. RoEsKE LOCK FCR THREADED DEVICES Filed Fb. l0, 1921- 2 Sheets-Sxheet 2 Patented Mar. 17, 1925.

UNITED STATES WALTER. F. ROESKE, 0F CHICAGO, ILLINOIS.

LOCK FOR THREADED DEVICES.

Application led February I, 1921. Serial No. 443,780.

To all 'whom it may concern:

Be it known that I, WALTER F. RoEsKE, a citizen of the United Stat s, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Locks for Threaded Devices, of which the following is a specification.

My invention lrelates to locking devices for caps or other articles applied to threaded nozzles and consists in providing the cap with key controlled elements by means of which rotation of the cap on the nozzle may be revented.

he object of my invention is to prevent unauthorized removal of a cap, or of any attachment secured to the cap, from the nozzle. A familiar application of my invention is to the nozzles of automobile radiators, equipped with thermal indicating devices or with emblems of value which, at present, are easily stolen from the car, and in the accompanying drawin I have illustrated my invention as appli to a radiator cap.

Fig. 1 is an elevation of a radiator nozzle equipped with my improved ca-p and having a. temperature indicator formed integrally therewith and showing the key which controls the cap inserted therein.

Fig. 2 is a vertical, transverse section through the cap taken on the line 2 2 of Fig. 1 and showing the locking device in unlocked position.

Fig. 3 is a similar section taken at right angles to the section shown in Fig. 2 on th line 3 3 of Fig. 2.

Fig. 4 illustrates the various parts of the lock separated from each other but facing each other as when assembled.

The remaining figures illustrate a modiication of my invention in which- Fig. 5 corres nds to Fig. 2 but showing the cap locked 1n osition on a nozzle.

Fig. 6 is a section similar to Figw but showing the cap unlocked. j

Fig. 7 is a partial section taken on the line 7-7 of Fig. 5 showing the key controlling elements. l

Fig. 8 illustrates the various parts of the modified cap separated from each other but facing each other as when assembled.

Fig. 9 shows the nozzle and a cooperatin locking element adapted tov be moun thereon.

especially those whichy are' Fig. 10 is a bottom view of the .cap assembled and Fig. 11 is a bottom view of the'cooperat-- ing element which must be mounted on the nozzle.

In my preferred form, as illustrated in Figs. 1 to 4, a cap 1 is provided with a cylinder lock 2, the cam finger 3 of which, when the lock is in locked position, extends below the inner surface of the top of cap 1 as shown in Figs. 2 and3, and when the lock is in unlocked position, finger 3 is turned so as to be retracted above the inner surface of the top of the cap. The inner face of the cap is provided with spaced teeth 4 and 5 which form opposed stops. At the lower edge of the cap is a iiXed ring 6 provided with internal threads 7. Adjacent the inner surface of the top of the cap is a clutch disk 8, the upper face of which is provided with a tooth 9 adapted to engage tooth 5 on the cap.

Below disk 8 1s a shell 10 loosely fitting within cap l and provided on its upper face with projections 11, and on its inside wall with threads 7 a. A spring 12 is located between disk 8 and shell 10 and is adapted to thrust the former upwardly. The-spring 12 and disk 8 are provided with holes 13 and 14 respectively to accommodate projections 11 on shell 10. When the parts are as-v sembled these projections 11 are adjacent the inner surface of the top of cap 1 and one of them will be positioned between teeth 4 and 5. The two additional stops 11 have no operative function land are provided tol facilitate assembly. A spacing washer 15 is placed between shell 10 and ring 6.`

When the parts shown in Fig. 4 are assembled and the lock is turned to unlocking position on of the projections 11 v on shell 10 will engage tooth 4 on cap 1 and at the same time tooth 9 on disk 8 will, engage tooth 5on cap 1 thus holding shell 10 nonrotatably 4in cap 1. The annular ring 6 mustvbe so vassembled with cap 1 that its threads 7 form a continuation of threads 7El on shell 10 when the latter is secured as above described. It is obvious that under these circumstances the cap may be rotated ineither direction upon aI nozzle inthe. usual manner. j

If the key A be turned to set the lock in locked osition, turning iin er 3 tothe .position s own in Figs. 2 an `3, disk 8 will lio be thereby moved, against the pressure of spring 12,'away from the inner surface of cap 1 and its tooth 9 will be disengaged from tooth 5. This will not affect the engagement of projection 11 and tooth 4 nor, con uently, the screwing on movement of t e cap to the ri ht, but if a screwin of:` movement to t e left is attemptedg, the disengagement of teeth 9 and 5 will permit relative rotation of the shell in the cap and will result in a disali'gnment-or discontinuance of threads 7 and 7?'. The friction between threads 7 and the nozzle threads could be made suiiicient to produce this relative rotation or it may be advisable or even necessary to provide additional friction such as would be produced by screwing the nozzle right against the inner face of shellA 10. -It is obvious that such rotation of the cap will now result in a 'locknut operation of shell 10 and the annular ring 6 and the greater force applied to unscrew the cap the tighter the latter will be locked to the nozzle to resist left hand rotation. It will be understood that a very slight rotation of cap 1 under these circumstances will result in its being locked, the result takingplaee before stop 11 engages tooth 5. At any time, the cap may be agam rotated to the right-so as to bring tooth 4 against the .projection 11 and, if finger 3 is lturned to release disk 8, spring. 12v will thrust the latter up so that tooth 9 engages tooth 5 and the shell may be unscrewed from the nozzle.

In'the modification shown in Figs. 5 to 11 the nozzle 16 is equipped with a non-rotatable ratchet 17 having upwardly facing, radially formed teeth. The cap' 18 is provided with `a member 11,9 having downward- 1y extending pawl teeth 2O adapted to e-ngage the teeth of ratchet 1.7. Below member 19 is a cover 21 havin arcuate openings 22 adapted to permit teet 20 of member 19 to proJect therethrough. A carrier 23 is secured to the inner. face of the top ofcap 18 and supports cover 21 and member 19. Cap 18 mounts a cylinder lock 24, the cam finger 25 of which projects below the inner face of v.the top of the ca p vand engages a notch 26 in cover 21. Member 19 is provided with a notch 27 so wide that member 19 is not affected by movement ofng'er 25. When finger 25 ismoved by means of key B from the positionshown in Fig.r 5 to the position shown in Fig. '6 land vice versa .it will rotate cover 21"to"vv the left and back'again.

'Member 19 is held againstxromtion relative 4to the cap by the engagement-, of notches 28 with elements 2901i carrier 23.

The' teeth 20 ofA member 19 proect through openings 2,2.in cover 21 only w' en the latteris at its'extremeright hand posit1on as shown in* F ig. 6. y Whenthe cover is turned to its left hand position,- 1t is drawn over teeth 20 and prevents engagement of the latter with the teeth of ratchet 17. A

spring 30 presses downwardly on member 19 I lcap may be freely unscrewed.

I am aware that various other modifications of my invention may be made Without departing from the principle thereof and I contemplate the usual subst-itution of equivalent elements in the commercial development of my invention.

I claim: j

1. In a nozzle cap, a threaded portion fixed thereto, a relatively rotatable threaded portion normally secured in a position in which it forms a continuation of said first mentioned portion, and key controlled means for releasing said rotatable portion to permit same to move to a position in which it does not form a continuation of said first mentioned portion.

2. In a nozzle cap, a fixed portion having a thread, a rotatable shell within the cap having a similar thread the threads 0n the fixed portion and on the shell being continuons in one position of the shell and discontinuous when the shell is otherwise positioned, elements normally holding said shell in said first mentioned position and means.I

for rendering said elements ineffective.

3. In a nozzle cap, anintegral portion having an interior thread, a relatively-rotatable section having an interior thread adapted, when in a predetermined position, to form a continuation of said first mentioned thread, and a key controlled element adapted to secure said section in said position. v

4. In a nozzle cap, continuously threaded elements, angularly movable relative to each other to a position in which they are not ,oontinuously threaded and key controlled meansA fory securing suoli elements against suchrelative movement.

5. In a locking device, continuously threaded elements angularly movable relative to each other to a position in which the are not continuousl threaded', in whic position they form a ook nut, and relatively movable means for said elements against such' relative movement to release said lock'nut. Y

6. v,In a nozzle ca a portion fixed thereto and having threa s, a relatively "movable member having threads adapted, when said member is in a predetermined position, to form a continuation of' said first mentioned threads, opposed teeth on said cap, an element on said member adapted to be engaged by oneof said teeth when said member is in said position and whereby said member may be rotated in a right hand direction, a retraetable element on said member adapted when not retracted to be engaged by the other of said teeth when said member is in said position and whereby said member may be rotated in a left hand direction, and a lock finger normally holding said member in retracted position and adapted tobe operated to advance said retractable element to tooth engaging position.

7. In a nozzle cap, a portion fixed thereto and having threads, a relatively movable member havingthrea'ds adapted, when said member is in a predetermined position, to form a continuation of said first mentioned threads, opposed teeth on said cap, an element on said member adapted to be engaged by one of said teeth when said member is in said position and whereby said member may be rotated in a right hand direction, a retractable element on said member adapted when not retracted to be engaged by the other of said teeth when said member is in said position and whereby said member may be rotated in av left hand direction, and key controlled means normally holding said member in retracted osition.

WA TER F. ROESKE. 

